there’s an online media database called Bacon’s, which you can’t get into without a subscription (it’s pricey) and if you have a username/password you can easily create a list of all the contact info for the reporters/editors/producers on any given beat. If you belong to a college or university, or have access to a public library, there’s a chance some of those institutions might be able to let you on to Bacons. Or, the old fashioned way, buy the magazines and towards the front there will be a masthead where it lists all the editors and what they cover. Once you have the name of hte person, call the magazine’s general number and ask for that person’s extension or email. Some magazines won’t give it out, but some will.